Casio fx 991MS User Guide - Page 24

Equation, Calculations - quadratic equation on

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k Engineering Notation Calculations • Example 1: To convert 56,088 meters to kilometers → 56.088 ҂103 (km) 56088 = J • Example 2: To convert 0.08125 grams to milligrams → 81.25 ҂10 -3 (mg) 0.08125 = J Equation EQN Calculations The EQN Mode lets you solve equations up to three degrees and simultaneous linear equations with up to three unknowns. Use the F key to enter the EQN Mode when you want to solve an equation. EQN F F 1 (fx-95MS) F F F 1 (Other Models) k Quadratic and Cubic Equations Quadratic Equation: ax2 + bx + c = 0 Cubic Equation: ax3 + bx2 + cx + d = 0 Entering the EQN Mode and pressing r displays the initial quadratic/cubic equation screen. Deg r ee? 2 3 Use this screen to specify 2 (quadratic) or 3 (cubic) as the degree of the equation, and input values for each of the coefficients. Coefficient name a? Arrow indicates direction you should scroll to 0. view other elements. Element value 22

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22
k
Engineering Notation Calculations
2
3
Degree?
EQN
•
Example 1:
To convert 56,088 meters to kilometers
→
56.088
±
10
3
56088
=
J
(km)
•
Example 2:
To convert 0.08125 grams to milligrams
→
81.25
±
10
–3
0.08125
=
J
(mg)
Equation
Calculations
The EQN Mode lets you solve equations up to three de-
grees and simultaneous linear equations with up to three
unknowns.
Use the
F
key to enter the EQN Mode when you want
to solve an equation.
EQN
..........................
F
F
1
(fx-95MS)
F
F
F
1
(Other Models)
k
Quadratic and Cubic Equations
Quadratic Equation:
ax
2
+
bx
+
c
= 0
Cubic Equation:
ax
3
+
bx
2
+
cx
+
d
= 0
Entering the EQN Mode and pressing
r
displays the ini-
tial quadratic/cubic equation screen.
Use this screen to specify 2 (quadratic) or 3 (cubic) as the
degree of the equation, and input values for each of the
coefficients.
0.
a?
Element value
Coefficient name
Arrow indicates
direction you
should scroll to
view other
elements.